Obsidian's front matter is a way to add metadata to your notes. This metadata can be used to customize how your notes are displayed, or to add information that can be used by plugins.
For example, you can use front matter to set a note's title, author, tags, and other attributes. You can also use front matter to add images, videos, or other media to a note.
To add front matter to a note, simply create a new line at the top of the note and type three dashes (---). Then, type the front matter key and value on separate lines. For example:
title: My Obsidian Note
author: John Doe
tags: obsidian, note taking
You can add as much or as little front matter as you like. Obsidian will automatically save any changes you make to front matter, and you can access it by clicking the "Front Matter" button in the note editor.